US3881869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemiluminescent detection of ozone
Assignee: Rosemount Inc
•
Filing: 1973-07-02
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Granted: 1975-05-06
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Expires: 1993-07-02
Abstract
Abstract The concentration of ozone in a gas sample, such as ambient air, can be quantitatively measured by contacting the gas sample with an organic polymer having a backbone chain consisting of carbon atoms to produce a chemiluminescent reaction and measuring the intensity of light emitted by the reaction. The polymer undergoes no apparent chemical change, indicating that it functions as a catalyst in the chemiluminescent reaction.
Inventors
- 👤 Radhakrishna Murty Neti
- 👤 George I Reeves
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:06
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/75; G01N21/76; G01N21/766; G01N31/00; Y; Y10; Y10T; Y10T436/00; Y10T436/20; Y10T436/206664
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
43 words
A METHOD OF QUANTITATIVELY MEASURING THE CONCENTRATION OF OZONE IN A GAS SAMPLE, WHICH METHOD COMPRISES: CONTACTING A BED OF SOLID PARTICLES OF AN ORGANIC POLYMER HAVING A BACKBONE CHAIN CONSISTING OF CARBON ATOMS WITH AN OZONE CONTAINING GAS SAMPLE TO PRODUCE CHEMILUMI-
Claim 2
Independent Claim
43 words
A METHOD OF QUANTITATIVELY MEASURING THE CONCENTRATION OF OZONE IN A GAS SAMPLE, WHICH METHOD COMPRISES: CONTACTING A BED OF SOLID PARTICLES OF AN ORGANIC POLYMER HAVING A BACKBONE CHAIN CONSISTING OF CARBON ATOMS WITH AN OZONE CONTAINING GAS SAMPLE TO PRODUCE CHEMILUMI-
Claim 3
Dependent Claim
23 words
The method of claim 1 wherein the amount of ozone in the gas sample is between about 0.001 and 100 parts per million.
Claim 4
Dependent Claim
29 words
The method of claim 1 including the steps of restoring the efficiency of the polymer after prolonged repeated use in the method by contacting the polymer with ozone-free air.
Claim 5
Dependent Claim
16 words
The method of claim 3 wherein The molecular weight of the polymer is at least 2000.
Claim 6
Dependent Claim
10 words
The method of claim 4 wherein the polymer is synthetic.
Claim 7
Dependent Claim
12 words
The method of claim 5 wherein the polymer is polyethylene or polytetrafluoroethylene.
Claim 8
Dependent Claim
13 words
The method of claim 6 wherein the intensity of light is measured photoelectrically.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |